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Finding the Fourth Proportional to 315,079.15, 472,616.30 and 78,420.24

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Solution

The fourth proportional to 315,079.15, 472,616.30 and 78,420.24 is: 117,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,079.15 : 472,616.30 = 78,420.24 : x
  2. Step 2: Convert to fraction form
    315,079.15/472,616.30 = 78,420.24/x
  3. Step 3: Cross multiply
    315,079.15x = 472,616.30 × 78,420.24
  4. Step 4: Simplify right side
    315,079.15x = 37,062,681,656.54
  5. Step 5: Solve for x
    x = 37,062,681,656.54/315,079.15
  6. Step 6: Final answer
    x = 117,629.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.